FinalDestiny said
$45 * 250 sales = $11,250, with just 250 sales, which is pretty low for a decent theme.
Even with 100 sales, which is a decent amount of sales, you get 4500, which covers the work for a month.

G_and_P said
He is saying that you can’t just compare marketplace theme prices with custom project budget.
However, if you be kind to share screenshots from your project, probably you will get better idea what is the real cost for a good coder to do it.